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MF-R300-0-14
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Product Detailed Parameters
- Description：PTC RESETTABLE 3.0A 30V RADIAL L
- Series：Multifuse®, MF-R
- Mfr：Bourns Inc.
- Package：Bulk
- Type：Polymeric
- Voltage - Max：30V
- Current - Hold (Ih) (Max)：3:00 AM
- Current - Trip (It)：6:00 AM
- Current - Max：40 A
- Time to Trip：10.8 s
- Resistance - Initial (Ri) (Min)：20 mOhms
- Resistance - Post Trip (R1) (Max)：80 mOhms
- Resistance - 25°C (Typ)：-
- Operating Temperature：-40°C ~ 85°C
- Grade：Automotive
- Qualification：AEC-Q200
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.472" L x 0.118" W (12.00mm x 3.00mm)
- Height - Seated (Max)：0.720" (18.30mm)
- Thickness (Max)：-
- Lead Spacing：0.201" (5.10mm)
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Overview
The Bourns MF-R300-0-14 is a radial leaded Polymeric Positive Temperature Coefficient (PPTC) resettable fuse from the MF-R series. It features a holding current of 3 A and a trip current of 6 A, with a maximum voltage rating of 30 VDC. The device has a maximum resistance of 50 mΩ and can withstand a maximum fault current of 40 A. It operates within a temperature range of -40°C to +85°C and utilizes a 5.1 mm lead spacing for PCB mounting.
Feature Summary
- Provides automatic circuit protection by increasing resistance in response to overcurrent or overheating conditions
- Offers reusable functionality that restores normal operation after cooling without requiring manual replacement
- Designed for surface or through-hole PCB integration using radial leads
Applications
- Overcurrent protection for portable electronic devices
- Protection circuits for battery-powered equipment
- Surge protection in low-voltage DC power lines
Procurement Notes
Verify the specific suffix codes against the official Bourns datasheet to confirm exact electrical tolerances and packaging configurations. Ensure the selected variant matches the required voltage and current ratings for the target application. Confirm RoHS compliance status if restricted substances are a constraint for the end product.
Selection Notes
Select this component based on the 3 A holding current and 30 VDC maximum voltage requirements. Consider the 50 mΩ initial resistance for minimal voltage drop impact. Evaluate the thermal environment to ensure operation remains within the specified -40°C to +85°C range during normal load conditions.
Part Context
This part belongs to the Bourns MF-R series of resettable fuses, which are widely used for circuit protection in consumer electronics and industrial applications. The series provides a reliable alternative to traditional one-time fuses by offering self-resetting capabilities after fault conditions clear.
Replacement Considerations
Consult the official Bourns substitution guide for verified equivalents. Generic PPTC fuses may not match the precise tripping characteristics or physical dimensions required for the original design.
